Die-holder for pi n- m ach i nes



(No Model.)

B. SMART.

DIE HOLDER FOR PIN MACHINES. No. 327,028. Patented Sept. 29, 1885.

Momma:

WW u Mv MvouA/L N. PETERS, PhMo-Uihugnpher, Washinglcn, 0.1:.

error-a EZRA SMART, OF HARTFORD, CONNECTICUT.

DIE-HOLDER FOR PIN-=IVEACHINES.

QJPECEFECATION forming part of Letters Patent No. 327,028, datedSeptember 29, 1885.

Application filed May 3, 1985.

To aZZ whom, it may concern.-

Be it known that I, EZRA SMART, of Hartford, in the county of Hartfordand State of Connecticut, have invented certain new and usefulImprovements in Die-Holders for Pin- Machines, of which the following isa full, clear, and exact description, reference being had to theaccompanying drawings, where Figure l is a detail view, in elevation, ofpart of a pinnmking machine with my improvement attached, and showingthe removable die-block in front view. Fig. 2 is a view in centralvertical section through the die-block on the axis of the wire. Fig. 3isa detail view in horizontal section through the parts of the machineon a plane passing through the center of the wire and heading-die, anddcnoted by the dotted line 5000 in Fig. 1.

My invention relates to the general class of automatic pin-makingmachines, and is particularly adapted for use 011 the wellknown Johnsonpin-machine, although several features thereof are applicable to asimilar class of machines for making bent or headed articles cut from acontinuous length of wire.

It consists in the removable die-holder or block having a cut-offsocketand length-gage, the block also bearing the piirholding andheading-dies, and in the combination of the parts as more particularlyhereinafter described.

My invention is described with particular reference to its use on apin-making machine; and in the accompanying drawings, where like lettersindicate the same parts throughout the figures, the letter a denotes thebed ofa pin-making machine of ordinary construction and material. 1)indicates the upright part ofthe machine, in a socket in which theremovable die-block c is held, as by means of clamp-screws, in asubstantially vertical position, the opening through the center of thedies, when closed, coming exactly in line with the wire-hole b throughthe upright arm of the machine.

Only so much of the machine is illustrated as is new or may benecessaryto show the con nection between the old and new devices.

The die-block c bears holding-dies d d, the lower one of whichfjd, isclamped in position in the holder so that the wire, as it feeds (No modethrough the machine, rests in the socket in its face, while the upperdie, d, is longitudinally movable and is operated by means of a lever,c, to clamp or release the wire. The meeting faces of these twoholdingdies are slightly countersunk on their front edge, forming anenlargement into which the projecting end of a piece of wireis upset bymeans of thepunch or heading die 7", which is borne in an adjustablearm, 5/, attached to the die (1. The foot of this punclrholding arm 9has a slot, 9, through which a clamp-screw passes into the die d, and bymeans of this device the punch can be exactly adjusted with its axis inthe path of the wire as it feeds through the machine and directly infront of the t pening between the holding-dies. This punchfhas in itsface a recess of proper size and outline to form the head of the pin,and it is driven against the end of the wire, which projects slightlybeyond the front face of the holding device, by means of the slidingblock and cam, in the ordinary manner. This punch is thrown outwardafter each blow by means of the spring f, arranged between the outerendof the arm and a collar on the punch.

The die-block c has a transverse opening directly across the path of thewire, and in this opening the cut-off h slides across the wire, shearingoff the length required to form a pin after this blank has been properlyheaded, and pushing it out of the laterally opening socket in thedie-block onto the ordinary feed-screw, by means of which the pin iscarried to another part of the machine, to be pointed and finished.

The method of heading a pin-blank by means of my improved device is asfollows: The upper holding-die is lifted and the wire fed through untilit projects slightly beyond the face of the die, which then closes uponthe wire and holds it while the heading die or punch strikesit andslightly upsets it. The up per die is again lifted and the wire againfed slightly forward. It is again held by the die and a second blowstruck by the heading-die. This operation is again repeated and the headcompleted, and the blank is then out 01f from the wire and thrust outfrom the die-block in the manner already described.

One of the advantages of my improvement is due to the fact that theholding-dies are backed up against the blow from the headingdie by meansof a solid mass of metal in the die-block, which insures better work andgreater durability of the parts. Another advantage lies in the fact thatthe die-block bears both the holding and heading dies and means fortheir adjustment, which are made before the block is secured in place inthe machine so that no change is necessary after such parts arein placeto work; and another advantage consists in forming the opening throughthe body of the die for the cut-off, which enables the latter to operateas a lengthgage in addition to its function as a cut-off.

The pushout h reciprocates with the cutoff h, being drivenfrom the samecam, and it so strikes the pin-blank at a point near the center of itslength as to assist the cut-off in thrusting it onto the feed-screw. Asuitable opening is made in the upright b and the die block forthepassage of the pushout.

After the screws, which pass through openings in the upright 1) into thescrew-socketsc inthe back of the die-block, (see Fig. 2,) have beenremoved, the die-block can betaken 0d the machine by slipping it'to theright so as to clear the end of the feedscrews and then pulling up orforward. This operation is reversed in putting the die-block in place.

The opening in the die-block c for the pasadjustable heading-die securedto the block outside the holding-dies, and having the transverse cutot'fsocket, in combination with the cut-off, all substantially as described.

8. In combination with the feed and die operating mechanism of apin-making machine, the removable die-block 0, having the transverseopenings for the passage of the pin-wire and cut-off h, and'bearing theholding-dies d and d, the latter bearing the adjustable arm 9, whichsupports the longitudinally-reciprocating heading-die f, allsubstantially as de-' scribed.

EZRA SMART.

. \Vitnesses:

CHAS. L. BURDETT, H. R. WILLIAMs.

